CN214354829U

CN214354829U - Printing stock positioning element and screen printing machine using same

Info

Publication number: CN214354829U
Application number: CN202120061668.2U
Authority: CN
Inventors: 张永胜
Original assignee: Shijiazhuang Shenghui Machinery Technology Co ltd
Current assignee: Shijiazhuang Shenghui Machinery Technology Co ltd
Priority date: 2020-11-20
Filing date: 2021-01-11
Publication date: 2021-10-08
Anticipated expiration: 2031-01-11

Abstract

A kind of stock positions the part and uses the screen printer of this part, the longitudinal orientation part includes: the image sensor is used for shooting the longitudinal position of a printing stock and is positioned above the material receiving station of the circulating belt; the processor is connected with the image sensor, and an output signal of the processor is transmitted to the execution motor; the execution motor is a circulating belt driving motor or a screen printing plate longitudinal movement motor or a printing head longitudinal movement motor; the negative pressure adsorption platform is used for adsorbing the printing stock on a material receiving station and a printing station of a circulating belt, an air suction hole is formed in the circulating belt, and the negative pressure adsorption platform comprises a material receiving station negative pressure adsorption platform and a printing station negative pressure adsorption platform which are surrounded by the circulating belt. The positioning component is combined with the layout of three stations of the circulating belt, the arrangement position of the image sensor is changed, so that the deviation of the longitudinal displacement of the printing stock can be sensed in advance, and high-precision positioning is realized while the printing stock is exchanged at high speed (namely high-speed printing).

Description

Printing stock positioning element and screen printing machine using same

Technical Field

The utility model belongs to the technical field of the screen printing technique and specifically relates to a stock positioning element still relates to the circulation belt screen printing machine who uses this part, and this circulation belt screen printing machine also is the full-automatic plano-plano flat structure screen printing machine of sola.

Background

The basic structure of the screen printing comprises a printing platform (used for bearing a printing stock), a printing head (a screen printing plate is arranged on the printing head, and a doctor blade and a return blade are arranged above the screen printing plate), a transmission component and a positioning component for realizing the positioning of the printing stock.

At present, two positioning modes of a sheet flat-pressing screen printing machine are provided, namely mechanical positioning and image acquisition positioning. In the mechanical positioning, the printing stock can generate bending deformation under the erosion action of temperature, humidity and printing ink, so that the negative pressure pull gauge cannot effectively adsorb and drive the printing stock to complete the positioning, and the positioning precision is difficult to ensure. In order to realize image acquisition and positioning, in the prior art, two cameras are installed at a printing platform (for example, patent No. CN 210309494U), after a printing stock is fixed on the printing platform, the two cameras shoot the position of the printing stock, and transmit the result to a control system, and obtain a deviation value after calculation, and then according to the deviation value, the corresponding position of the printing platform or the printing head is moved to achieve the purpose of correction. The positioning mode can obtain higher positioning precision, but printing and exchange of printing stocks cannot be realized during positioning, namely, the positioning time is increased in the printing process, so that the printing speed is slow, and the printing speed is usually only 300 sheets/hour. And the mechanical positioning precision is not enough or can not be positioned when the printing stock is bent, the silk-screen printing stock is mostly cut into single sheets by a coil, the unidirectional bending of the printing stock cut by the coil is obvious, and finally, the internal structure of the silk-screen printing stock has directionality in the manufacturing of the printing stock raw material, and unidirectional bending can be generated when the temperature and the humidity are changed, the unidirectional bending makes the mechanical positioning of the printing stock very difficult, and the positioning precision can not meet the requirements of customers.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming that exists among the prior art, the utility model provides a stock positioning element, this positioning element has changed the mounted position who takes a photograph unit image sensor among the prior art, in order to obtain stock positional information in advance, take a photograph next stock positional information simultaneously in printing station printing, and in the stock exchange (at this moment the printing station is going on returning black) the position of adjustment half-tone screen, the stock reachs printing station while half-tone screen and reachs the position the same with the stock, owing to adopt the endless belt to utilize half-tone screen apart from exchanging the stock, need not to open half-tone screen and print platform during the exchange stock, exchange direct printing behind the stock, in order to in time adjust the position of half-tone screen before stock carries to printing station, in order to promote the speed of undertaking by a wide margin, the technical scheme of adoption is: a screen printing stock positioning member, characterized by: the positioning member comprises a longitudinal positioning member, the longitudinal positioning member comprising: the image sensor is used for shooting the longitudinal position of a printing stock and is positioned above the material receiving station of the circulating belt; the processor is connected with the image sensor, and an output signal of the processor is transmitted to the execution motor; the execution motor is a circulating belt driving motor or a screen printing plate longitudinal movement motor or a printing head longitudinal movement motor; the negative pressure adsorption platform is used for adsorbing printing stocks on a material receiving station and a printing station of a circulating belt, an air suction hole is formed in the circulating belt, and the negative pressure adsorption platform comprises a material receiving station negative pressure adsorption platform and a printing station negative pressure adsorption platform which are surrounded by the circulating belt. The image sensor obtains longitudinal positioning information by photographing overprint marks and the like from the second color printing, and photographing time is synchronized with the previous printing stock ink scraping printing. The image sensor is arranged at the material receiving station, so that the position of the printing stock reaching the printing station can be sensed in advance on the premise of ensuring that the conveying precision is unchanged, and the vertical relative position between the screen printing plate and the printing stock can be changed by finely adjusting the conveying position of the circulating belt, the position of the screen printing plate or the position of a printing head so as to meet the requirements of quick and accurate positioning.

The positioning component further comprises a transverse positioning component, and the transverse positioning component comprises a transverse positioning assembly arranged at the material receiving station of the circulating belt. The transverse positioning assembly is matched with the longitudinal positioning component for use, and the printing stock positioning is completed in two directions.

The transverse positioning assembly comprises a driving cylinder and a piston rod or a motor-driven piston rod, wherein one end of the piston rod or the motor-driven piston rod is positioned in the driving cylinder and used for pushing the printing stock. The transverse end of the printing stock is pushed by the piston rod, so that the transverse positioning operation is realized. Because the extension length of the piston rod is controllable, the transverse positioning can be realized on the premise of not configuring a positioning column.

The transverse positioning assembly further comprises a positioning column which is arranged opposite to the driving cylinder. In order to further improve the positioning precision, the positioning component is provided with a positioning column, and the printing stock is abutted against the positioning column under the pushing action of the piston rod to realize transverse positioning.

And at least one group of positioning blocks or positioning shafts for limiting the moving track of the circulating belt is arranged on the negative pressure adsorption platform or on two sides of the circulating belt. Therefore, the circulating belt can run more accurately and stably, does not slip or deviate particularly when running at high speed, and meets the requirement of adjusting the position of a printed object through the circulating belt in longitudinal positioning.

And a material pressing shaft is arranged at the material receiving station of the circulating belt. The printing stock is adsorbed by the negative pressure by the stock after arriving at the material receiving station, and the seriously crooked printing stock is pressed flat by the swage spindle, simultaneously because the swage spindle is silica gel preparation has certain viscosity, the swage spindle also has the effect of printing stock dust removal.

The utility model also discloses a sola full-automatic concora crush formula screen printing machine, including print head, printing platform and conveyor, the print head includes half tone and ink scraping knife, even black sword, conveyor includes the circulatory band along the parallel laminating setting of flush platform, and the circulatory band corresponds establishes and connects material station, printing station and ejection of compact station, its characterized in that: the screen printing machine further includes a positioning part including a longitudinal positioning part including: the image sensor is used for shooting the longitudinal position of a printing stock and is positioned above the material receiving station of the circulating belt; the processor is connected with the image sensor, and an output signal of the processor is transmitted to the execution motor; the execution motor is a circulating belt driving motor or a screen printing plate longitudinal movement motor or a printing head longitudinal movement motor; the negative pressure adsorption platform is characterized in that the negative pressure adsorption platform is used for adsorbing printing stock on a material receiving station and a printing station of a circulating belt, an air suction hole is formed in the circulating belt, the negative pressure adsorption platform is a part of the printing platform, and the circulating belt surrounds the material receiving station negative pressure adsorption platform and the printing station negative pressure adsorption platform. The screen printing machine provided by the utility model is provided with three stations, each station has at least one printing stock at the same time, when the material receiving station carries out transverse positioning, adsorption and fixation of the printing stock, and shoots the longitudinal position of the printing stock, and prints the previous printing stock at the printing station; when the circulating belt exchanges printing stocks, the material receiving station printing stocks reach the printing station, the printed matters of the printing station reach the discharging station, and the three station printing stock exchanges are completed by one step pitch. The print stations include a wiping period during which the robot or conveyor belt feeds the next substrate to the endless belt, and a return period during which switching of different print/substrate positions occurs. The negative pressure adsorption component overcomes the problem of inaccurate bending and positioning of printing stock materials, the image sensor at the material receiving station is arranged to lead the image position detection from the traditional printing station to the material receiving station in advance, the processor sends out signals in time after the detection is finished, and the silk screen plate reaches the correct position while the printing stock is exchanged, so that the problem that the time is consumed for waiting for the adjustment of the position of the silk screen plate at the printing station is effectively overcome, the loss of work efficiency is avoided, and the printing speed of the printing machine is increased.

The screen printing machine further comprises a paper feeding machine positioned at the front end of the circulating belt, the paper feeding machine comprises a storage table, and a movable suction nozzle is arranged above the storage table; the screen printing machine further comprises a material conveying belt arranged between the material storage table and the printing platform. Through the absorption of the suction nozzle, the printing stock moves to the material conveying belt from the material storage table, and then is conveyed to the material receiving station by the material conveying belt.

The circulating belt is a metal rigid belt with the thickness of 0.1-0.6 mm. The feeding accuracy and stability are guaranteed by the selection of the metal rigid belt.

The circulating belt is driven by a circulating belt driving servo motor. The selection of the servo motor ensures the requirements of driving accuracy and precision.

The circulating belt is provided with at least one group of positioning blocks or positioning shafts for limiting the moving track of the circulating belt, so that the circulating belt can run along a straight line to ensure the precision of the exchanged printing stocks.

The printing station is provided with an air suction area size adjusting device; the area size adjusting device is a longitudinal and transverse bidirectional adjusting device. Through the device, can in time adjust the size of the wind-force that induced drafts when stock size or crooked change, can ensure that reliable absorption is on the endless belt when the endless belt exchanges the stock, better promotion conveying accuracy.

The screen printing machine further comprises a dryer located at the rear end of the printing platform, and the dryer comprises a drying box and a material outlet belt. The printed matter output from the discharging station is quickly dried under the action of the dryer and then is output to the receiving machine, so that the full-automatic labor saving in the printing and drying process is realized, the next printing machine can be connected with a plurality of machines through drying, the multicolor printing is completed, the work of receiving the printed matter and placing the printed matter into the storage table during printing and drying is reduced, the labor intensity is reduced, and more printing machines can be operated by one person, so that the working efficiency is greatly improved.

The beneficial effects of the utility model reside in that: the positioning component combines the layout of three stations of the circulating belt, changes the arrangement position of the image sensor, and forwards the image sensor which is traditionally arranged at the printing station to the material receiving station, so that the deviation of the longitudinal displacement of the printing stock can be sensed in advance and the adjustment can be carried out in time, thereby saving the adjustment time after the printing stock enters the printing station and achieving the purposes of quickly adjusting and positioning and improving the constant speed and precision; the printing machine is provided with the image sensor type longitudinal positioning component, and each station has at least one printing stock at the same time, so that each station realizes the transfer and the handover of the printing stocks according to the beat, and the work efficiency loss is avoided; the printing speed of the CCD mode is increased from 300 sheets/hour to 2000 sheets/hour.

Drawings

Fig. 1 is the utility model discloses a fly to reach the embodiment front view who carries the stock, and fig. 2 is the top view of fig. 1, and fig. 3 is the top view that removes the chase in fig. 2, and fig. 4 is the utility model discloses a manipulator carries still another embodiment of stock, and fig. 5 is the utility model discloses the three station of well printing station is overlooked the schematic diagram. Fig. 6 is an embodiment of the present invention for adjusting the position of the silk screen plate and realizing the adjustment of the longitudinal position.

1 is a paper feeder, 2 is a main machine, and 3 is a dryer.

The device comprises a feeder 11, a material storage table 12, a material conveying belt 13, a feeding manipulator 14, a driving cylinder 15, a piston rod 16 and a positioning column 17.

21 is a frame, 22 is a printing platform, 23 is a printing head, 231 is a silk screen plate, 232 is a ink knife, 233 is a transverse moving servo motor, 234 is a longitudinal moving servo motor, 235 is a screen frame, 24 is a circulating belt, 241 is a dust removing roller, 242 is a material pressing bead, 243 is a circulating belt driving positioning shaft, 244 is a circulating belt driving positioning block, 245 is a circulating belt driving servo motor, 25 is an image sensor, 26 is a material receiving station, 27 is a printing station, and 28 is a material discharging station.

31 is a discharge conveyor belt.

Detailed Description

The utility model discloses a stock positioning element still discloses the screen printing machine who installs this part. The main action modes of printing are as follows:

the ink scraping plate and the ink scraping knife are pressed downwards to enable the screen printing plate to be in contact with a printing stock, the ink scraping knife moves to extrude ink in the screen printing plate onto the printing stock, and the ink scraping knife is lifted; the ink distributing knife descends to the silk screen plate, and the ink distributing knife is operated to cover the ink on the patterns of the silk screen plate; and (4) exchanging the printing stock, moving the printed matter (the printing stock after obtaining the ink) out of the printing platform, and entering the printed matter (the printing stock) to be printed into the printing platform.

Example one

See figure 1, the utility model discloses a screen printing machine is a sheet-fed flatly-pressed full-automatic screen printing machine, adopts the endless belt to go up unloading in step, and full-automatic printing machine includes paper feeder 1, host computer 2 and drying-machine 3, establishes on the paper feeder 1 and flies to reach 11, flies to reach 11 and includes the suction nozzle, and the below that flies to reach 11 is storage platform 12, through the absorption of suction nozzle, can separate into the sola outside transport with the stock on the storage platform 12.

The main body 2 comprises a printing head 23 and a printing platform 22, the printing head 23 is positioned above the printing platform 22, the printing platform 22 is horizontally fixed on the frame 21, the printing head 2 is hinged or arranged on the frame 21 in a vertical sliding mode, and the printing head 23 and the printing platform 22 are horizontal when buckled.

The circulating belt 24 surrounds the printing platform 22, the circulating belt sequentially comprises a material receiving station 26, a printing station 27 and a discharging station 28 according to the advancing direction, the negative pressure adsorption platform and the material receiving adsorption platform are part of the printing platform 22, namely air holes are formed in the surfaces of the negative pressure adsorption platform and the material receiving adsorption platform, and the conveyed printing stock can be adsorbed on the circulating belt and can move along with the position of the printing stock along with the circulating belt corresponding to air suction holes formed in the circulating belt.

The circulating belt is provided with three stations, at least one printing stock is arranged on the printing station and the material receiving station, the functions of the respective stations are simultaneously executed at different positions on the circulating belt, and when the material receiving station carries out transverse positioning, adsorption fixing and shooting of the printing stock, the printing station prints the previous printing stock; when the circulating belt exchanges printing stocks, the material receiving station printing stocks reach the printing station, and the printing station presswork reaches the discharging station or is sent out of the printing machine, wherein the three station printing stock exchanges are completed by one step at the same time; the printing station comprises a scraping time period and a returning time period, the switching of different printed matter/printed matter positions occurs in the returning time period, a printed material is conveyed to the circulating belt by the conveying belt in the scraping time period (at the moment, the circulating belt is not moved), the printed material is conveyed by adopting the feeder and the conveying belt as the circulating belt, the position above the circulating belt is not occupied by the conveyed printed material conveyed by the conveying belt (figure 1), and a mechanical positioning device can be arranged at the position above the circulating belt receiving station to mechanically position the printed material in the longitudinal direction and the transverse direction or in the transverse direction.

The material receiving station 26 is provided with a transverse positioning assembly for positioning the printing stock transversely (perpendicular to the running direction of the circulating belt), and the positioning assembly comprises a driving cylinder 15, a piston rod 16 driven by the driving cylinder 15, and a positioning column 17 installed in cooperation with the positioning position accuracy. When the material receiving station is longitudinally positioned, at least one image sensor 25 is arranged above the material receiving station, the image sensor is also called a camera, an industrial camera, a CCD, an image controller and the like, and the arrangement of two image sensors and the arrangement of the diagonal positions are better in consideration of precision and cost.

The printing stock of the screen printing machine is separated from a storage table by a feeder and is sent to a conveyer belt, the conveyer belt sends the printing stock to a material receiving station of a circulating belt, a transverse positioning assembly positions a transverse position, the air suction is used for fixing the printing stock, an image sensor shoots a position of the printing stock and sends a numerical value obtained by shooting to a processor, the processor calculates a longitudinal deviation value and sends the longitudinal deviation value to a circulating belt driving servo motor 245, the motor 245 drives a circulating belt driving shaft, the longitudinal deviation value is corrected when the printing stock is exchanged, namely, when the material receiving station shoots the printing stock, the circulating belt runs more and less when the circulating belt runs later, the printing stock reaches the printing station and is the same as a screen printing plate position, the correction of the relative position between the position of the printing stock on the circulating belt and the screen printing plate is realized, the aim of accurately positioning the longitudinal position of the printing stock is achieved, and the positioning precision of the unidirectional bent printing stock is improved, the camera is adopted, the endless belt is used for exchanging the printing stock to correct the longitudinal position deviation, extra mechanical parts are not needed to be added, the accurate positioning of the single bent printing stock can be achieved by the camera, and the camera is an extremely low-cost solution.

Example two

As shown in fig. 4, the printing material of the screen printing machine is separated from the stocker 12 by the feeding robot 14, and is sucked and conveyed forward by the suction nozzle provided at the lower portion of the feeding robot 14. The connection of the printing head and the frame is provided with two transverse moving servo motors 233 and a driving screw rod in the transverse direction, and a longitudinal moving servo motor 234 and a driving screw rod (which are common standard three-axis platforms and are not described in detail), through the arrangement of the three motors and the screw rods, the output value after the detection value of the front-end image sensor is input to the processor is matched, the power output by the

servo motors

233 and 234 moves the printing head through transmission parts such as the screw rods, and the like, and the relative position between the screen printing plate 231 and the printing stock is adjusted, so that the purpose that the relative position of the printing stock and the screen printing plate is consistent, namely, the positioning is achieved. Of course, the above-mentioned means can also be used on the screen frame 235 (frame for supporting the screen plate), and the position of the screen plate 231 can be changed, so as to adjust the relative position between the screen plate 231 and the printing material, and achieve the purpose of positioning the printing material and the screen plate in a consistent relative position, which is the same as the first embodiment.

The circulating belt 24 is in a closed ring shape, the circulating belt 24 can be a rigid belt with the thickness of 0.1-0.6mm, and the running and printing precision of the rigid belt made of stainless steel materials is higher than that of a flat belt; the upper surface of the printing platform 22 is provided with a circulating belt transverse (perpendicular to the running direction) driving positioning block 244 or a circulating belt transverse positioning shaft 243 for limiting the position of the circulating belt, a pair of guide rollers are arranged at the lower half circle of the circulating belt, and a pair of clamping wheels or guide wheels are arranged beside the guide rollers to ensure that the circulating belt runs along a straight line; the stepping distance of the circulating belt is driven by a servo motor or a stepping motor, a mechanical arm or a conveying belt of the feeder puts a printed material into a material receiving station, the printed material is conveyed to a printing platform (obtaining ink and called as a printed product) by the circulating belt 24 and then enters a blanking station, the movement of the printed material from the material receiving station, the printing station and the blanking station is synchronously completed by supporting, adsorbing and fixing on the circulating belt 24, and the printed product directly falls onto a printed product output device (such as a conveying belt) after reaching the blanking station. During the printing time of the printing head, a feeding manipulator or a conveying belt sends a printing stock to a circulating belt 24, the printing stock is adsorbed and fixed at a material receiving station, two image sensors shoot the position of the printing stock, the vertical and horizontal deviation values to be detected are calculated, after the printing of the printing station is finished, the circulating belt rotates, the printing head or a silk screen plate moves to the same position as the printing stock, the printing stock is transferred to the printing station in an adsorption state, the silk screen plate moves to the same position as the printing stock while the circulating belt rotates to exchange the printing stock, then the printing is directly started, and after the printing is finished, the circulating belt sends the printing stock to a blanking station. The printing product with the structure does not need to be positioned after reaching the printing station, and the adsorption shooting positioning information at the material receiving station is completed when the printing head prints a printing stock, so the positioning time of the printing station can be further saved, the printing efficiency is greatly improved, the relative position of the printing stock from the material receiving station to the printing station is unchanged because the material receiving station is provided with the clamping edge guide circularly and the driving step distance is realized by the high-precision servo motor, the position of the printing stock shooting the printing stock at the material receiving station can be predicted to reach the printing station, the silk screen plates can synchronously move to the same position when the printing stock is exchanged in the circular belt, the printing stock can be immediately printed after the exchange of the printing stock is completed, compared with the prior art that CCD is shot by an image sensor, the printing platform is moved or the silk screen alignment is opened, the printing head and the blanking manipulator can not print the time for taking the printing product away, the printing head waits for exchanging the printing stock to cause printing pause, Printing speed is slow, the utility model discloses to shoot the printed matter position and exchange stock time and scrape the even black time of china ink and merge, thereby improved CCD location printing speed greatly, improved 2000 from 300, shoot the printing figure location and solved circulation belt type automata printing bending material and printing first color back overall dimension change and cause the inaccurate problem in location, the utility model discloses combine circulation belt synchronous exchange stock and image sensor location too high stock positioning accuracy greatly, solved that the printed matter is dried back dimensional change can't lean on limit location problem, image sensor shoots the location and is applied to high-speed circulation type area automata, the rate of certified products greatly improves when the printed matter of printing bending and size change, printed matter defective rate greatly reduced, economic benefits is showing.

EXAMPLE III

As shown in fig. 6, the difference between this embodiment and the above embodiments is that the print head is provided with two driving components such as a transverse servo motor and a lead screw, the material receiving station is provided with two mechanical longitudinal and transverse positioning mechanisms, the material receiving station is provided with two image sensors, and the other structures are in the second embodiment.

The embodiment also provides a printing stock transverse positioning assembly, which comprises a driving cylinder 15 and a piston rod 16, wherein a friction block is arranged at one end of the piston rod, in use, the bottom of the friction block is in contact with the surface of a printing stock to be positioned, the printing stock is driven to abut against a positioning column 17 by virtue of friction force to realize transverse positioning, and then the printing stock is moved longitudinally to realize positioning in two directions.

The two edges of the material are firstly positioned in a mechanical mode when the printing stock reaches the material receiving station, the material is fixed in an adsorption mode, the position of the printing stock is shot by the two image sensors, the screen printing plate is transversely positioned to move to the correct position when the printing stock is exchanged, the same embodiment as the second embodiment is adopted, the circulation belt is longitudinally positioned to enable the printing stock to reach the correct position, the same embodiment as the first embodiment is adopted, the accurate positioning is realized when the printing stock is exchanged, the printing stock exchange and the ink distribution are carried out simultaneously, when the printing stock exchange is completed, the ink scraping printing can be immediately carried out, and the printing speed and the printing overprinting accuracy are greatly improved.

The utility model discloses saved vertical servo motor and mechanical structure and practiced thrift the cost of manufacture, the exchange stock is accomplished and can be printed at once, compares prior art CCD shadow and utilizes image sensor to shoot, removes print platform or silk screen printing board and just can print, has improved printing speed greatly and has improved 2000 from 300, shoots the printing figure location and has solved the inaccurate problem in circulating area automaton crooked material location, the utility model discloses combine the synchronous exchange stock of endless belt and image sensor location to have improved stock positioning accuracy greatly and make the printed matter rate of certified products improve greatly, solved the unable limit location problem of size change after the printed matter is dried.

The above embodiments are merely examples of the various design modes of the present invention, and the present invention can also be applied to other structures. Such as: the embodiment of the utility model discloses a circulating belt can also be one-way slope (see patent 202020172390.1) and utilize gravity to fix a position horizontal or vertical position, combines CCD camera removal silk screen version or circulating belt accurate positioning again.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.

Claims

1. A screen printing stock positioning member, characterized by: the positioning member comprises a longitudinal positioning member, the longitudinal positioning member comprising:

the image sensor is used for shooting the longitudinal position of a printing stock and is positioned above the material receiving station of the circulating belt;

the processor is connected with the image sensor, an output signal of the processor is transmitted to the execution motor, and the execution motor is a circulating belt driving motor or a screen printing plate longitudinal movement motor or a printing head longitudinal movement motor;

the negative pressure adsorption platform is used for adsorbing printing stocks on a material receiving station and a printing station of a circulating belt, an air suction hole is formed in the circulating belt, and the negative pressure adsorption platform comprises a material receiving station negative pressure adsorption platform and a printing station negative pressure adsorption platform which are surrounded by the circulating belt.

2. The screen substrate positioning member according to claim 1, wherein: the positioning component further comprises a transverse positioning component, and the transverse positioning component comprises a transverse positioning assembly arranged at the material receiving station of the circulating belt.

3. The screen substrate positioning element of claim 2, wherein: the transverse positioning assembly comprises a driving cylinder and a piston rod or a motor-driven piston rod, wherein one end of the piston rod or the motor-driven piston rod is positioned in the driving cylinder and used for pushing the printing stock.

4. The screen substrate positioning element of claim 3, wherein: the transverse positioning assembly further comprises a positioning column which is arranged opposite to the driving cylinder.

5. The screen substrate positioning element according to any of claims 1 to 4, wherein: and at least one group of positioning blocks or positioning shafts for limiting the moving track of the circulating belt is arranged on the negative pressure adsorption platform or on two sides of the circulating belt.

6. The screen substrate positioning element of claim 5, wherein: and a material pressing shaft is arranged at the material receiving station of the circulating belt.

7. The utility model provides a full-automatic concora crush formula screen printer of sola, includes print head, printing platform and conveyor, and the print head includes half tone and ink scraping sword, ink distributing sword, conveyor includes the circulatory band, and the circulatory band corresponds to establish and connects material station, printing station and ejection of compact station, its characterized in that: the screen printing machine further includes a positioning part including a longitudinal positioning part including:

the processor is connected with the image sensor, and an output signal of the processor is transmitted to the execution motor; the execution motor is a circulating belt driving motor or a screen printing plate longitudinal movement motor or a printing head longitudinal movement motor;

the negative pressure adsorption platform is characterized in that the negative pressure adsorption platform is used for adsorbing printing stock on a material receiving station and a printing station of a circulating belt, an air suction hole is formed in the circulating belt, the negative pressure adsorption platform is a part of the printing platform, and the circulating belt surrounds the material receiving station negative pressure adsorption platform and the printing station negative pressure adsorption platform.

8. The sheet-fed fully-automatic flat-bed flat screen printing press according to claim 7, wherein: the screen printing machine further comprises a paper feeding machine positioned at the front end of the circulating belt, the paper feeding machine comprises a storage table, and a movable suction nozzle is arranged above the storage table; the screen printing machine further comprises a material conveying belt arranged between the material storage table and the printing platform.

9. The screen printing machine according to claim 7, wherein: the circulating belt is a metal rigid belt with the thickness of 0.1-0.6 mm.

10. The screen printing machine according to claim 7, wherein: the circulating belt is driven by a circulating belt driving servo motor.

11. The screen printing machine according to claim 7, wherein: the printing station is provided with an air suction area size adjusting device; the area size adjusting device is a longitudinal and transverse bidirectional adjusting device.

12. The screen printing machine according to claim 7, wherein: the screen printing machine further comprises a dryer located at the rear end of the printing platform, and the dryer comprises a drying box and a discharging conveying belt.